Biogas Production from Organic wastes and Iron as an Additive – A Short Review

Abstract

The world is facing a serious energy crisis and environmental pollution problems due to a sharp increase in the world population. Bioenergy is an eminent solution to these problems. Anaerobic digestion is a green energy technology used worldwide for the conversion of organic waste to biogas. It is reported that organic wastes are hard to digest and need some technical improvement in the anaerobic digestion process to improve biogas yield. Iron-based additives, due to their electron acceptance and donation capabilities, have been emphasized as being exceptional in improving anaerobic digestion process efficiency amongst all other enhancement options. This study reviews the major available types of iron-based additives, their characteristics, and their preparation methods. The preferred iron-based additive that has a significant effect on the enhancement of biogas yield is also discussed. The use of iron-based additives in the anaerobic digestion process with varying dosages and their impact on the biogas generation rate is also being studied. Substrates, operating parameters, and types of anaerobic digesters used in recent studies while researching the effects of iron-based additives are also part of this review. Lastly, this study also confirms that iron-based additives have a significant effect on the reduction rate of the volatile suspended solids, methane content, biogas yield, and volatile fatty acids.

Coaxial microbial electrolysis cell for cost‐effective bioenergy production and wastewater treatment of potato industry effluent

“…Numerous studies have previously been reported for the treatment of effluents from various sectors, i.e. domestic, food processing, swine, winery, landfill leachate, makgeolli, sugar industry and paper industry 15‐22 . There have been only a few research papers published on the use of potato processing wastewater (PPW) as a substrate in MEC systems 19,23 .…”

“…domestic, food processing, swine, winery, landfill leachate, makgeolli, sugar industry and paper industry. [15][16][17][18][19][20][21][22] There have been only a few research papers published on the use of potato processing wastewater (PPW) as a substrate in MEC systems. 19,23 However, PPW has various distinct benefits that set it apart from other types of wastewaters as a potential substrate for MECs.…”